From a28aa175d43d9f2db3e18cc83005601cf8a26c8d Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sat, 18 Jul 2020 14:48:28 +0200
Subject: Add turbo-fish works after `()`

---
 crates/ra_assists/src/handlers/add_turbo_fish.rs | 29 +++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/crates/ra_assists/src/handlers/add_turbo_fish.rs b/crates/ra_assists/src/handlers/add_turbo_fish.rs
index f7e1a7b05..0c565e89a 100644
--- a/crates/ra_assists/src/handlers/add_turbo_fish.rs
+++ b/crates/ra_assists/src/handlers/add_turbo_fish.rs
@@ -25,7 +25,14 @@ use crate::{
 // }
 // ```
 pub(crate) fn add_turbo_fish(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let ident = ctx.find_token_at_offset(SyntaxKind::IDENT)?;
+    let ident = ctx.find_token_at_offset(SyntaxKind::IDENT).or_else(|| {
+        let arg_list = ctx.find_node_at_offset::<ast::ArgList>()?;
+        if arg_list.args().count() > 0 {
+            return None;
+        }
+        mark::hit!(add_turbo_fish_after_call);
+        arg_list.l_paren_token()?.prev_token().filter(|it| it.kind() == SyntaxKind::IDENT)
+    })?;
     let next_token = ident.next_token()?;
     if next_token.kind() == T![::] {
         mark::hit!(add_turbo_fish_one_fish_is_enough);
@@ -82,6 +89,26 @@ fn main() {
         );
     }
 
+    #[test]
+    fn add_turbo_fish_after_call() {
+        mark::check!(add_turbo_fish_after_call);
+        check_assist(
+            add_turbo_fish,
+            r#"
+fn make<T>() -> T {}
+fn main() {
+    make()<|>;
+}
+"#,
+            r#"
+fn make<T>() -> T {}
+fn main() {
+    make::<${0:_}>();
+}
+"#,
+        );
+    }
+
     #[test]
     fn add_turbo_fish_method() {
         check_assist(
-- 
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